Tip the onion, celery and carrot into a slow cooker (it should have at least 3.5-litre capacity – halve the recipe for a smaller model). Stir in the courgette and parsley stalks. Tip in the beans along with their liquid, the chopped tomatoes and tomato purée, then mix to combine. Add the stock, garlic granules, oregano and bay leaves. Mix, then cook on high for 3-4 hrs until the veg is tender and cooked.

Add the spaghetti 20 mins before the end of the cooking time, then add the kale and frozen peas 10 mins later. Continue to cook until the spaghetti and peas are tender. Drizzle over the olive oil and sprinkle over the parsley leaves and seeds, if using. Serve with crusty bread rolls, if you like.